Parts for your 2015 Toyota Bb-Thrust bearing

2015 Toyota bB thrust-bearing — is it actually a thing on this model?

Short answer: a serviceable “thrust bearing” isn’t a thing on the 2015 Toyota bB as sold in Japan and commonly landed in AU/NZ. Technical documentation for the QNC20/QNC21 bB shows it’s paired with a 4‑speed automatic transaxle and does not use a manual clutch, so there’s no clutch thrust/release bearing to replace. Where thrust bearings do exist on this vehicle, they’re internal parts (engine crankshaft thrust washers and automatic transmission thrust bearings/washers) and aren’t routine service items.

Why it’s not used: in a manual, the clutch release/thrust bearing lets the pressure plate disengage when the pedal’s pressed. The 2015 bB’s torque converter automatic does that job hydraulically, so there’s no external release/thrust bearing in the driveline to maintain or swap out.

• Engine: crankshaft thrust washers are integrated with the main bearings. They control end‑float but aren’t replaced unless the engine’s being rebuilt.
• Transmission: internal thrust bearings/washers manage axial loads inside the auto. They’re addressed only during a transmission overhaul.
• Suspension: some people say “strut thrust bearing”, but on the bB it’s a strut top mount with an integrated bearing, serviced as a mount/bearing assembly if noisy or notchy.

Chasing “thrust-bearing” noises on a bB? If there’s a rumble at idle that changes in Drive vs Neutral, think accessory pulleys, A/C compressor clutch, or the torque converter — not a clutch bearing. Clunks over bumps point more to top mounts, sway-bar links, or lower arm bushes.

Practical servicing tips for AU/NZ owners instead of a non-existent thrust-bearing swap:

• Change automatic transmission fluid on time to keep the converter and internals happy.
• Inspect strut top mounts/bearings when doing front shocks, replace as pairs if rough or noisy.
• Check wheel bearings for play and road noise, especially on higher‑km imports.
• Monitor crankshaft end‑float only if diagnosing unusual issues like flex-plate wear or odd idle behaviour.

Technical basis: Toyota Electronic Parts Catalog (EPC) listings for bB QNC20/QNC21 (MY2015) show no clutch release/thrust bearing, the Repair Manual for the bB (Chassis/Automatic Transmission) covers a 4‑speed auto only, engine documentation for K3‑VE/3SZ‑VE specifies thrust washers as part of the main bearing set. These sources collectively indicate no standalone, serviceable “thrust-bearing” for this model year.

Does a 2015 Toyota bB have a clutch thrust (release) bearing?

No. The 2015 bB is fitted with a 4‑speed automatic, so there’s no manual clutch and no external clutch release/thrust bearing to service. If a rare grey‑import has been manual‑swapped, that would be a one‑off case outside factory spec.

What parts on a 2015 bB might people mean by “thrust bearing”?

Usually it’s one of three things: the engine’s crankshaft thrust washers, internal automatic transmission thrust bearings/washers, or the front strut top mount bearing. Of these, only the strut top mount bearing is a normal service replacement item.

What should be serviced instead if someone was told to “do the thrust-bearing” on a bB?

Stick to an ATF change, inspect/replace strut top mounts if noisy or notchy, and check wheel bearings. Engine thrust washers and auto trans thrust bearings are internal and only handled during major overhauls.